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SPX3819S-1.8 from SP

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SPX3819S-1.8

Manufacturer: SP, SIPEX

500mA, Low-Noise LDO Voltage Regulator
Partnumber Manufacturer Quantity Availability
SPX3819S-1.8,SPX3819S18 SP, SIPEX 2985 In Stock

Description and Introduction

500mA, Low-Noise LDO Voltage Regulator The part **SPX3819S-1.8** is a low-dropout (LDO) voltage regulator manufactured by **Maxim Integrated (now part of Analog Devices)**.  

### **Specifications:**  
- **Output Voltage:** 1.8V  
- **Maximum Output Current:** 500mA  
- **Dropout Voltage:** 300mV (typical at 500mA)  
- **Input Voltage Range:** 2.2V to 5.5V  
- **Low Quiescent Current:** 50µA (typical)  
- **High PSRR:** 70dB at 1kHz  
- **Thermal Shutdown & Current Limit Protection**  
- **Package:** SOT-223  

### **Descriptions and Features:**  
- Designed for battery-powered applications requiring stable voltage regulation.  
- Low dropout voltage improves efficiency in low-input voltage conditions.  
- Stable with low-ESR ceramic capacitors (≥1µF).  
- Suitable for portable devices, embedded systems, and power-sensitive applications.  
- Includes thermal shutdown and current limit protection for enhanced reliability.  

For detailed electrical characteristics, refer to the official **Maxim Integrated (Analog Devices) datasheet**.

Application Scenarios & Design Considerations

500mA, Low-Noise LDO Voltage Regulator

Alternative Part Number

  • LM1117S-1.8 --: Pin-compatible 1.8V low-dropout linear regulator in the same SOT-223 style package with comparable current rating, widely available and well documented.
  • AMS1117-1.8 --: Common 1.8V LDO regulator with similar dropout and output current, often used as a drop-in replacement in SOT-223 designs.
  • LD1117S18 --: 1.8V fixed LDO in SOT-223 with equivalent electrical characteristics and good availability as an alternative source.
  • MIC39100-1.8 --: 1.8V low-dropout regulator with similar output current and package footprint, suitable as an alternative when SPX3819 availability is limited.

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